3 * Copyright (c) 1987-1997 Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
16 #include "patchlevel.h"
18 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
23 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
24 char *getenv _((char *)); /* Usually in <stdlib.h> */
27 dEXTCONST char rcsid[] = "perl.c\nPatch level: ###\n";
35 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
45 curcop = &compiling; \
52 laststype = OP_STAT; \
54 maxsysfd = MAXSYSFD; \
61 laststype = OP_STAT; \
66 static void find_beginning _((void));
67 static void forbid_setid _((char *));
68 static void incpush _((char *, int));
69 static void init_ids _((void));
70 static void init_debugger _((void));
71 static void init_lexer _((void));
72 static void init_main_stash _((void));
74 static struct perl_thread * init_main_thread _((void));
75 #endif /* USE_THREADS */
76 static void init_perllib _((void));
77 static void init_postdump_symbols _((int, char **, char **));
78 static void init_predump_symbols _((void));
79 static void my_exit_jump _((void)) __attribute__((noreturn));
80 static void nuke_stacks _((void));
81 static void open_script _((char *, bool, SV *));
82 static void usage _((char *));
83 static void validate_suid _((char *, char*));
86 static int fdscript = -1;
88 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
89 #include <asm/sigcontext.h>
91 catch_sigsegv(int signo, struct sigcontext_struct sc)
93 PerlProc_signal(SIGSEGV, SIG_DFL);
94 fprintf(stderr, "Segmentation fault dereferencing 0x%lx\n"
95 "return_address = 0x%lx, eip = 0x%lx\n",
96 sc.cr2, __builtin_return_address(0), sc.eip);
97 fprintf(stderr, "thread = 0x%lx\n", (unsigned long)THR);
102 CPerlObj* perl_alloc(IPerlMem* ipM, IPerlEnv* ipE, IPerlStdIO* ipStd,
103 IPerlLIO* ipLIO, IPerlDir* ipD, IPerlSock* ipS, IPerlProc* ipP)
105 CPerlObj* pPerl = new(ipM) CPerlObj(ipM, ipE, ipStd, ipLIO, ipD, ipS, ipP);
115 PerlInterpreter *sv_interp;
118 New(53, sv_interp, 1, PerlInterpreter);
125 CPerlObj::perl_construct(void)
127 perl_construct(register PerlInterpreter *sv_interp)
133 struct perl_thread *thr;
134 #endif /* FAKE_THREADS */
135 #endif /* USE_THREADS */
138 if (!(curinterp = sv_interp))
143 Zero(sv_interp, 1, PerlInterpreter);
146 /* Init the real globals (and main thread)? */
151 #ifdef ALLOC_THREAD_KEY
154 if (pthread_key_create(&thr_key, 0))
155 croak("panic: pthread_key_create");
157 MUTEX_INIT(&sv_mutex);
159 * Safe to use basic SV functions from now on (though
160 * not things like mortals or tainting yet).
162 MUTEX_INIT(&eval_mutex);
163 COND_INIT(&eval_cond);
164 MUTEX_INIT(&threads_mutex);
165 COND_INIT(&nthreads_cond);
167 thr = init_main_thread();
168 #endif /* USE_THREADS */
170 linestr = NEWSV(65,80);
171 sv_upgrade(linestr,SVt_PVIV);
173 if (!SvREADONLY(&sv_undef)) {
174 SvREADONLY_on(&sv_undef);
178 SvREADONLY_on(&sv_no);
180 sv_setpv(&sv_yes,Yes);
182 SvREADONLY_on(&sv_yes);
185 nrs = newSVpv("\n", 1);
186 rs = SvREFCNT_inc(nrs);
190 /* sighandlerp = sighandler; */
192 sighandlerp = sighandler;
198 * There is no way we can refer to them from Perl so close them to save
199 * space. The other alternative would be to provide STDAUX and STDPRN
202 (void)fclose(stdaux);
203 (void)fclose(stdprn);
209 perl_destruct_level = 1;
211 if(perl_destruct_level > 0)
216 lex_state = LEX_NOTPARSING;
218 start_env.je_prev = NULL;
219 start_env.je_ret = -1;
220 start_env.je_mustcatch = TRUE;
221 top_env = &start_env;
224 SET_NUMERIC_STANDARD();
225 #if defined(SUBVERSION) && SUBVERSION > 0
226 sprintf(patchlevel, "%7.5f", (double) 5
227 + ((double) PATCHLEVEL / (double) 1000)
228 + ((double) SUBVERSION / (double) 100000));
230 sprintf(patchlevel, "%5.3f", (double) 5 +
231 ((double) PATCHLEVEL / (double) 1000));
234 #if defined(LOCAL_PATCH_COUNT)
235 localpatches = local_patches; /* For possible -v */
238 PerlIO_init(); /* Hook to IO system */
240 fdpid = newAV(); /* for remembering popen pids by fd */
244 New(51,debname,128,char);
245 New(52,debdelim,128,char);
253 CPerlObj::perl_destruct(void)
255 perl_destruct(register PerlInterpreter *sv_interp)
259 int destruct_level; /* 0=none, 1=full, 2=full with checks */
264 #endif /* USE_THREADS */
267 if (!(curinterp = sv_interp))
273 /* Pass 1 on any remaining threads: detach joinables, join zombies */
275 MUTEX_LOCK(&threads_mutex);
276 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
277 "perl_destruct: waiting for %d threads...\n",
279 for (t = thr->next; t != thr; t = t->next) {
280 MUTEX_LOCK(&t->mutex);
281 switch (ThrSTATE(t)) {
284 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
285 "perl_destruct: joining zombie %p\n", t));
286 ThrSETSTATE(t, THRf_DEAD);
287 MUTEX_UNLOCK(&t->mutex);
290 * The SvREFCNT_dec below may take a long time (e.g. av
291 * may contain an object scalar whose destructor gets
292 * called) so we have to unlock threads_mutex and start
295 MUTEX_UNLOCK(&threads_mutex);
297 SvREFCNT_dec((SV*)av);
298 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
299 "perl_destruct: joined zombie %p OK\n", t));
301 case THRf_R_JOINABLE:
302 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
303 "perl_destruct: detaching thread %p\n", t));
304 ThrSETSTATE(t, THRf_R_DETACHED);
306 * We unlock threads_mutex and t->mutex in the opposite order
307 * from which we locked them just so that DETACH won't
308 * deadlock if it panics. It's only a breach of good style
309 * not a bug since they are unlocks not locks.
311 MUTEX_UNLOCK(&threads_mutex);
313 MUTEX_UNLOCK(&t->mutex);
316 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
317 "perl_destruct: ignoring %p (state %u)\n",
319 MUTEX_UNLOCK(&t->mutex);
320 /* fall through and out */
323 /* We leave the above "Pass 1" loop with threads_mutex still locked */
325 /* Pass 2 on remaining threads: wait for the thread count to drop to one */
328 DEBUG_L(PerlIO_printf(PerlIO_stderr(),
329 "perl_destruct: final wait for %d threads\n",
331 COND_WAIT(&nthreads_cond, &threads_mutex);
333 /* At this point, we're the last thread */
334 MUTEX_UNLOCK(&threads_mutex);
335 DEBUG_L(PerlIO_printf(PerlIO_stderr(), "perl_destruct: armageddon has arrived\n"));
336 MUTEX_DESTROY(&threads_mutex);
337 COND_DESTROY(&nthreads_cond);
338 #endif /* !defined(FAKE_THREADS) */
339 #endif /* USE_THREADS */
341 destruct_level = perl_destruct_level;
345 if (s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL")) {
347 if (destruct_level < i)
356 /* We must account for everything. */
358 /* Destroy the main CV and syntax tree */
360 curpad = AvARRAY(comppad);
365 SvREFCNT_dec(main_cv);
370 * Try to destruct global references. We do this first so that the
371 * destructors and destructees still exist. Some sv's might remain.
372 * Non-referenced objects are on their own.
379 /* unhook hooks which will soon be, or use, destroyed data */
380 SvREFCNT_dec(warnhook);
382 SvREFCNT_dec(diehook);
384 SvREFCNT_dec(parsehook);
387 if (destruct_level == 0){
389 DEBUG_P(debprofdump());
391 /* The exit() function will do everything that needs doing. */
395 /* loosen bonds of global variables */
398 (void)PerlIO_close(rsfp);
402 /* Filters for program text */
403 SvREFCNT_dec(rsfp_filters);
404 rsfp_filters = Nullav;
416 sawampersand = FALSE; /* must save all match strings */
417 sawstudy = FALSE; /* do fbm_instr on all strings */
432 /* magical thingies */
434 Safefree(ofs); /* $, */
437 Safefree(ors); /* $\ */
440 SvREFCNT_dec(nrs); /* $\ helper */
443 multiline = 0; /* $* */
445 SvREFCNT_dec(statname);
449 /* defgv, aka *_ should be taken care of elsewhere */
451 /* clean up after study() */
452 SvREFCNT_dec(lastscream);
454 Safefree(screamfirst);
456 Safefree(screamnext);
459 /* startup and shutdown function lists */
460 SvREFCNT_dec(beginav);
462 SvREFCNT_dec(initav);
467 /* temp stack during pp_sort() */
468 SvREFCNT_dec(sortstack);
471 /* shortcuts just get cleared */
481 /* reset so print() ends up where we expect */
484 /* Prepare to destruct main symbol table. */
491 if (destruct_level >= 2) {
492 if (scopestack_ix != 0)
493 warn("Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
494 (long)scopestack_ix);
495 if (savestack_ix != 0)
496 warn("Unbalanced saves: %ld more saves than restores\n",
498 if (tmps_floor != -1)
499 warn("Unbalanced tmps: %ld more allocs than frees\n",
500 (long)tmps_floor + 1);
501 if (cxstack_ix != -1)
502 warn("Unbalanced context: %ld more PUSHes than POPs\n",
503 (long)cxstack_ix + 1);
506 /* Now absolutely destruct everything, somehow or other, loops or no. */
508 SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
509 while (sv_count != 0 && sv_count != last_sv_count) {
510 last_sv_count = sv_count;
513 SvFLAGS(strtab) &= ~SVTYPEMASK;
514 SvFLAGS(strtab) |= SVt_PVHV;
516 /* Destruct the global string table. */
518 /* Yell and reset the HeVAL() slots that are still holding refcounts,
519 * so that sv_free() won't fail on them.
528 array = HvARRAY(strtab);
532 warn("Unbalanced string table refcount: (%d) for \"%s\"",
533 HeVAL(hent) - Nullsv, HeKEY(hent));
534 HeVAL(hent) = Nullsv;
544 SvREFCNT_dec(strtab);
547 warn("Scalars leaked: %ld\n", (long)sv_count);
551 /* No SVs have survived, need to clean out */
555 Safefree(origfilename);
557 hints = 0; /* Reset hints. Should hints be per-interpreter ? */
559 DEBUG_P(debprofdump());
561 MUTEX_DESTROY(&sv_mutex);
562 MUTEX_DESTROY(&eval_mutex);
563 COND_DESTROY(&eval_cond);
565 /* As the penultimate thing, free the non-arena SV for thrsv */
566 Safefree(SvPVX(thrsv));
567 Safefree(SvANY(thrsv));
570 #endif /* USE_THREADS */
572 /* As the absolutely last thing, free the non-arena SV for mess() */
575 /* we know that type >= SVt_PV */
577 Safefree(SvPVX(mess_sv));
578 Safefree(SvANY(mess_sv));
586 CPerlObj::perl_free(void)
588 perl_free(PerlInterpreter *sv_interp)
594 if (!(curinterp = sv_interp))
602 CPerlObj::perl_parse(void (*xsinit) (CPerlObj*), int argc, char **argv, char **env)
604 perl_parse(PerlInterpreter *sv_interp, void (*xsinit) (void), int argc, char **argv, char **env)
610 char *scriptname = NULL;
611 VOL bool dosearch = FALSE;
618 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
621 croak("suidperl is no longer needed since the kernel can now execute\n\
622 setuid perl scripts securely.\n");
627 if (!(curinterp = sv_interp))
631 #if defined(NeXT) && defined(__DYNAMIC__)
632 _dyld_lookup_and_bind
633 ("__environ", (unsigned long *) &environ_pointer, NULL);
638 #ifndef VMS /* VMS doesn't have environ array */
639 origenviron = environ;
645 /* Come here if running an undumped a.out. */
647 origfilename = savepv(argv[0]);
649 cxstack_ix = -1; /* start label stack again */
651 init_postdump_symbols(argc,argv,env);
656 curpad = AvARRAY(comppad);
661 SvREFCNT_dec(main_cv);
665 oldscope = scopestack_ix;
673 /* my_exit() was called */
674 while (scopestack_ix > oldscope)
679 call_list(oldscope, endav);
681 return STATUS_NATIVE_EXPORT;
684 PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
688 sv_setpvn(linestr,"",0);
689 sv = newSVpv("",0); /* first used for -I flags */
693 for (argc--,argv++; argc > 0; argc--,argv++) {
694 if (argv[0][0] != '-' || !argv[0][1])
698 validarg = " PHOOEY ";
723 if (s = moreswitches(s))
733 if (euid != uid || egid != gid)
734 croak("No -e allowed in setuid scripts");
736 e_tmpname = savepv(TMPPATH);
737 (void)PerlLIO_mktemp(e_tmpname);
739 croak("Can't mktemp()");
740 e_fp = PerlIO_open(e_tmpname,"w");
742 croak("Cannot open temporary file");
747 PerlIO_puts(e_fp,argv[1]);
751 croak("No code specified for -e");
752 (void)PerlIO_putc(e_fp,'\n');
754 case 'I': /* -I handled both here and in moreswitches() */
756 if (!*++s && (s=argv[1]) != Nullch) {
759 while (s && isSPACE(*s))
763 for (e = s; *e && !isSPACE(*e); e++) ;
770 } /* XXX else croak? */
784 preambleav = newAV();
785 av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
787 Sv = newSVpv("print myconfig();",0);
789 sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
791 sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
793 #if defined(DEBUGGING) || defined(NO_EMBED) || defined(MULTIPLICITY)
794 sv_catpv(Sv,"\" Compile-time options:");
796 sv_catpv(Sv," DEBUGGING");
799 sv_catpv(Sv," NO_EMBED");
802 sv_catpv(Sv," MULTIPLICITY");
804 sv_catpv(Sv,"\\n\",");
806 #if defined(LOCAL_PATCH_COUNT)
807 if (LOCAL_PATCH_COUNT > 0) {
809 sv_catpv(Sv,"\" Locally applied patches:\\n\",");
810 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
812 sv_catpvf(Sv,"\" \\t%s\\n\",",localpatches[i]);
816 sv_catpvf(Sv,"\" Built under %s\\n\"",OSNAME);
819 sv_catpvf(Sv,",\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
821 sv_catpvf(Sv,",\" Compiled on %s\\n\"",__DATE__);
826 @env = map { \"$_=\\\"$ENV{$_}\\\"\" } sort grep {/^PERL/} keys %ENV; \
827 print \" \\%ENV:\\n @env\\n\" if @env; \
828 print \" \\@INC:\\n @INC\\n\";");
831 Sv = newSVpv("config_vars(qw(",0);
836 av_push(preambleav, Sv);
837 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
848 if (!*++s || isSPACE(*s)) {
852 /* catch use of gnu style long options */
853 if (strEQ(s, "version")) {
857 if (strEQ(s, "help")) {
864 croak("Unrecognized switch: -%s (-h will show valid options)",s);
869 if (!tainting && (s = PerlEnv_getenv("PERL5OPT"))) {
880 if (!strchr("DIMUdmw", *s))
881 croak("Illegal switch in PERL5OPT: -%c", *s);
887 scriptname = argv[0];
889 if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp)) {
891 warn("Did you forget to compile with -DMULTIPLICITY?");
893 croak("Can't write to temp file for -e: %s", Strerror(errno));
897 scriptname = e_tmpname;
899 else if (scriptname == Nullch) {
901 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
909 open_script(scriptname,dosearch,sv);
911 validate_suid(validarg, scriptname);
916 main_cv = compcv = (CV*)NEWSV(1104,0);
917 sv_upgrade((SV *)compcv, SVt_PVCV);
921 av_push(comppad, Nullsv);
922 curpad = AvARRAY(comppad);
923 comppad_name = newAV();
924 comppad_name_fill = 0;
925 min_intro_pending = 0;
928 av_store(comppad_name, 0, newSVpv("@_", 2));
929 curpad[0] = (SV*)newAV();
930 SvPADMY_on(curpad[0]); /* XXX Needed? */
932 New(666, CvMUTEXP(compcv), 1, perl_mutex);
933 MUTEX_INIT(CvMUTEXP(compcv));
934 #endif /* USE_THREADS */
936 comppadlist = newAV();
937 AvREAL_off(comppadlist);
938 av_store(comppadlist, 0, (SV*)comppad_name);
939 av_store(comppadlist, 1, (SV*)comppad);
940 CvPADLIST(compcv) = comppadlist;
942 boot_core_UNIVERSAL();
943 #if defined(WIN32) && defined(PERL_OBJECT)
947 (*xsinit)(THIS); /* in case linked C routines want magical variables */
948 #if defined(VMS) || defined(WIN32) || defined(DJGPP)
952 #if defined(DEBUGGING) && defined(USE_THREADS) && defined(__linux__)
953 DEBUG_L(PerlProc_signal(SIGSEGV, (void(*)(int))catch_sigsegv););
956 init_predump_symbols();
958 init_postdump_symbols(argc,argv,env);
962 /* now parse the script */
964 SETERRNO(0,SS$_NORMAL);
966 if (yyparse() || error_count) {
968 croak("%s had compilation errors.\n", origfilename);
970 croak("Execution of %s aborted due to compilation errors.\n",
974 curcop->cop_line = 0;
978 (void)UNLINK(e_tmpname);
983 /* now that script is parsed, we can modify record separator */
985 rs = SvREFCNT_inc(nrs);
987 sv_setsv(*av_fetch(thr->threadsv, find_threadsv("/"), FALSE), rs);
989 sv_setsv(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs);
990 #endif /* USE_THREADS */
1001 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
1002 dump_mstats("after compilation:");
1013 CPerlObj::perl_run(void)
1015 perl_run(PerlInterpreter *sv_interp)
1024 if (!(curinterp = sv_interp))
1028 oldscope = scopestack_ix;
1033 cxstack_ix = -1; /* start context stack again */
1036 /* my_exit() was called */
1037 while (scopestack_ix > oldscope)
1040 curstash = defstash;
1042 call_list(oldscope, endav);
1044 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
1045 dump_mstats("after execution: ");
1048 return STATUS_NATIVE_EXPORT;
1051 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1056 if (curstack != mainstack) {
1058 SWITCHSTACK(curstack, mainstack);
1063 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
1064 sawampersand ? "Enabling" : "Omitting"));
1067 DEBUG_x(dump_all());
1068 DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
1070 DEBUG_L(PerlIO_printf(Perl_debug_log, "main thread is 0x%lx\n",
1071 (unsigned long) thr));
1072 #endif /* USE_THREADS */
1075 PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
1078 if (PERLDB_SINGLE && DBsingle)
1079 sv_setiv(DBsingle, 1);
1081 call_list(oldscope, initav);
1091 else if (main_start) {
1092 CvDEPTH(main_cv) = 1;
1103 perl_get_sv(char *name, I32 create)
1107 if (name[1] == '\0' && !isALPHA(name[0])) {
1108 PADOFFSET tmp = find_threadsv(name);
1109 if (tmp != NOT_IN_PAD) {
1111 return *av_fetch(thr->threadsv, tmp, FALSE);
1114 #endif /* USE_THREADS */
1115 gv = gv_fetchpv(name, create, SVt_PV);
1122 perl_get_av(char *name, I32 create)
1124 GV* gv = gv_fetchpv(name, create, SVt_PVAV);
1133 perl_get_hv(char *name, I32 create)
1135 GV* gv = gv_fetchpv(name, create, SVt_PVHV);
1144 perl_get_cv(char *name, I32 create)
1146 GV* gv = gv_fetchpv(name, create, SVt_PVCV);
1147 if (create && !GvCVu(gv))
1148 return newSUB(start_subparse(FALSE, 0),
1149 newSVOP(OP_CONST, 0, newSVpv(name,0)),
1157 /* Be sure to refetch the stack pointer after calling these routines. */
1160 perl_call_argv(char *sub_name, I32 flags, register char **argv)
1162 /* See G_* flags in cop.h */
1163 /* null terminated arg list */
1170 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
1175 return perl_call_pv(sub_name, flags);
1179 perl_call_pv(char *sub_name, I32 flags)
1180 /* name of the subroutine */
1181 /* See G_* flags in cop.h */
1183 return perl_call_sv((SV*)perl_get_cv(sub_name, TRUE), flags);
1187 perl_call_method(char *methname, I32 flags)
1188 /* name of the subroutine */
1189 /* See G_* flags in cop.h */
1195 XPUSHs(sv_2mortal(newSVpv(methname,0)));
1198 return perl_call_sv(*stack_sp--, flags);
1201 /* May be called with any of a CV, a GV, or an SV containing the name. */
1203 perl_call_sv(SV *sv, I32 flags)
1205 /* See G_* flags in cop.h */
1208 LOGOP myop; /* fake syntax tree node */
1214 bool oldcatch = CATCH_GET;
1219 if (flags & G_DISCARD) {
1224 Zero(&myop, 1, LOGOP);
1225 myop.op_next = Nullop;
1226 if (!(flags & G_NOARGS))
1227 myop.op_flags |= OPf_STACKED;
1228 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1229 (flags & G_ARRAY) ? OPf_WANT_LIST :
1234 EXTEND(stack_sp, 1);
1237 oldscope = scopestack_ix;
1239 if (PERLDB_SUB && curstash != debstash
1240 /* Handle first BEGIN of -d. */
1241 && (DBcv || (DBcv = GvCV(DBsub)))
1242 /* Try harder, since this may have been a sighandler, thus
1243 * curstash may be meaningless. */
1244 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != debstash))
1245 op->op_private |= OPpENTERSUB_DB;
1247 if (flags & G_EVAL) {
1248 cLOGOP->op_other = op;
1250 /* we're trying to emulate pp_entertry() here */
1252 register PERL_CONTEXT *cx;
1253 I32 gimme = GIMME_V;
1258 push_return(op->op_next);
1259 PUSHBLOCK(cx, CXt_EVAL, stack_sp);
1261 eval_root = op; /* Only needed so that goto works right. */
1264 if (flags & G_KEEPERR)
1279 /* my_exit() was called */
1280 curstash = defstash;
1284 croak("Callback called exit");
1293 stack_sp = stack_base + oldmark;
1294 if (flags & G_ARRAY)
1298 *++stack_sp = &sv_undef;
1306 if (op == (OP*)&myop)
1307 op = pp_entersub(ARGS);
1310 retval = stack_sp - (stack_base + oldmark);
1311 if ((flags & G_EVAL) && !(flags & G_KEEPERR))
1315 if (flags & G_EVAL) {
1316 if (scopestack_ix > oldscope) {
1320 register PERL_CONTEXT *cx;
1332 CATCH_SET(oldcatch);
1334 if (flags & G_DISCARD) {
1335 stack_sp = stack_base + oldmark;
1344 /* Eval a string. The G_EVAL flag is always assumed. */
1347 perl_eval_sv(SV *sv, I32 flags)
1349 /* See G_* flags in cop.h */
1352 UNOP myop; /* fake syntax tree node */
1354 I32 oldmark = sp - stack_base;
1361 if (flags & G_DISCARD) {
1369 EXTEND(stack_sp, 1);
1371 oldscope = scopestack_ix;
1373 if (!(flags & G_NOARGS))
1374 myop.op_flags = OPf_STACKED;
1375 myop.op_next = Nullop;
1376 myop.op_type = OP_ENTEREVAL;
1377 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
1378 (flags & G_ARRAY) ? OPf_WANT_LIST :
1380 if (flags & G_KEEPERR)
1381 myop.op_flags |= OPf_SPECIAL;
1391 /* my_exit() was called */
1392 curstash = defstash;
1396 croak("Callback called exit");
1405 stack_sp = stack_base + oldmark;
1406 if (flags & G_ARRAY)
1410 *++stack_sp = &sv_undef;
1415 if (op == (OP*)&myop)
1416 op = pp_entereval(ARGS);
1419 retval = stack_sp - (stack_base + oldmark);
1420 if (!(flags & G_KEEPERR))
1425 if (flags & G_DISCARD) {
1426 stack_sp = stack_base + oldmark;
1436 perl_eval_pv(char *p, I32 croak_on_error)
1439 SV* sv = newSVpv(p, 0);
1442 perl_eval_sv(sv, G_SCALAR);
1449 if (croak_on_error && SvTRUE(ERRSV))
1450 croak(SvPVx(ERRSV, na));
1455 /* Require a module. */
1458 perl_require_pv(char *pv)
1460 SV* sv = sv_newmortal();
1461 sv_setpv(sv, "require '");
1464 perl_eval_sv(sv, G_DISCARD);
1468 magicname(char *sym, char *name, I32 namlen)
1472 if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
1473 sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
1477 usage(char *name) /* XXX move this out into a module ? */
1480 /* This message really ought to be max 23 lines.
1481 * Removed -h because the user already knows that opton. Others? */
1483 static char *usage_msg[] = {
1484 "-0[octal] specify record separator (\\0, if no argument)",
1485 "-a autosplit mode with -n or -p (splits $_ into @F)",
1486 "-c check syntax only (runs BEGIN and END blocks)",
1487 "-d[:debugger] run scripts under debugger",
1488 "-D[number/list] set debugging flags (argument is a bit mask or flags)",
1489 "-e 'command' one line of script. Several -e's allowed. Omit [programfile].",
1490 "-F/pattern/ split() pattern for autosplit (-a). The //'s are optional.",
1491 "-i[extension] edit <> files in place (make backup if extension supplied)",
1492 "-Idirectory specify @INC/#include directory (may be used more than once)",
1493 "-l[octal] enable line ending processing, specifies line terminator",
1494 "-[mM][-]module.. executes `use/no module...' before executing your script.",
1495 "-n assume 'while (<>) { ... }' loop around your script",
1496 "-p assume loop like -n but print line also like sed",
1497 "-P run script through C preprocessor before compilation",
1498 "-s enable some switch parsing for switches after script name",
1499 "-S look for the script using PATH environment variable",
1500 "-T turn on tainting checks",
1501 "-u dump core after parsing script",
1502 "-U allow unsafe operations",
1503 "-v print version number and patchlevel of perl",
1504 "-V[:variable] print perl configuration information",
1505 "-w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT. Recommended.",
1506 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
1510 char **p = usage_msg;
1512 printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
1514 printf("\n %s", *p++);
1517 /* This routine handles any switches that can be given during run */
1520 moreswitches(char *s)
1529 rschar = scan_oct(s, 4, &numlen);
1531 if (rschar & ~((U8)~0))
1533 else if (!rschar && numlen >= 2)
1534 nrs = newSVpv("", 0);
1537 nrs = newSVpv(&ch, 1);
1543 splitstr = savepv(s + 1);
1557 if (*s == ':' || *s == '=') {
1558 my_setenv("PERL5DB", form("use Devel::%s;", ++s));
1562 perldb = PERLDB_ALL;
1569 if (isALPHA(s[1])) {
1570 static char debopts[] = "psltocPmfrxuLHXD";
1573 for (s++; *s && (d = strchr(debopts,*s)); s++)
1574 debug |= 1 << (d - debopts);
1578 for (s++; isDIGIT(*s); s++) ;
1580 debug |= 0x80000000;
1582 warn("Recompile perl with -DDEBUGGING to use -D switch\n");
1583 for (s++; isALNUM(*s); s++) ;
1593 inplace = savepv(s+1);
1595 for (s = inplace; *s && !isSPACE(*s); s++) ;
1599 case 'I': /* -I handled both here and in parse_perl() */
1602 while (*s && isSPACE(*s))
1606 for (e = s; *e && !isSPACE(*e); e++) ;
1607 p = savepvn(s, e-s);
1613 croak("No space allowed after -I");
1623 *ors = scan_oct(s, 3 + (*s == '0'), &numlen);
1633 ors = SvPV(nrs, orslen);
1634 ors = savepvn(ors, orslen);
1638 forbid_setid("-M"); /* XXX ? */
1641 forbid_setid("-m"); /* XXX ? */
1646 /* -M-foo == 'no foo' */
1647 if (*s == '-') { use = "no "; ++s; }
1648 sv = newSVpv(use,0);
1650 /* We allow -M'Module qw(Foo Bar)' */
1651 while(isALNUM(*s) || *s==':') ++s;
1653 sv_catpv(sv, start);
1654 if (*(start-1) == 'm') {
1656 croak("Can't use '%c' after -mname", *s);
1657 sv_catpv( sv, " ()");
1660 sv_catpvn(sv, start, s-start);
1661 sv_catpv(sv, " split(/,/,q{");
1666 if (preambleav == NULL)
1667 preambleav = newAV();
1668 av_push(preambleav, sv);
1671 croak("No space allowed after -%c", *(s-1));
1688 croak("Too late for \"-T\" option");
1700 #if defined(SUBVERSION) && SUBVERSION > 0
1701 printf("\nThis is perl, version 5.%03d_%02d built for %s",
1702 PATCHLEVEL, SUBVERSION, ARCHNAME);
1704 printf("\nThis is perl, version %s built for %s",
1705 patchlevel, ARCHNAME);
1707 #if defined(LOCAL_PATCH_COUNT)
1708 if (LOCAL_PATCH_COUNT > 0)
1709 printf("\n(with %d registered patch%s, see perl -V for more detail)",
1710 LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : "");
1713 printf("\n\nCopyright 1987-1997, Larry Wall\n");
1715 printf("\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
1718 printf("djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n");
1719 printf("djgpp v2 port (perl5004) by Laszlo Molnar, 1997\n");
1722 printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
1723 "Version 5 port Copyright (c) 1994-1997, Andreas Kaiser, Ilya Zakharevich\n");
1726 printf("atariST series port, ++jrb bammi@cadence.com\n");
1729 Perl may be copied only under the terms of either the Artistic License or the\n\
1730 GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
1738 if (s[1] == '-') /* Additional switches on #! line. */
1749 #ifdef ALTERNATE_SHEBANG
1750 case 'S': /* OS/2 needs -S on "extproc" line. */
1758 croak("Can't emulate -%.1s on #! line",s);
1763 /* compliments of Tom Christiansen */
1765 /* unexec() can be found in the Gnu emacs distribution */
1776 prog = newSVpv(BIN_EXP);
1777 sv_catpv(prog, "/perl");
1778 file = newSVpv(origfilename);
1779 sv_catpv(file, ".perldump");
1781 status = unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
1783 PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n",
1784 SvPVX(prog), SvPVX(file));
1785 PerlProc_exit(status);
1788 # include <lib$routines.h>
1789 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
1791 ABORT(); /* for use with undump */
1797 init_main_stash(void)
1802 /* Note that strtab is a rather special HV. Assumptions are made
1803 about not iterating on it, and not adding tie magic to it.
1804 It is properly deallocated in perl_destruct() */
1806 HvSHAREKEYS_off(strtab); /* mandatory */
1807 Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
1808 sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
1810 curstash = defstash = newHV();
1811 curstname = newSVpv("main",4);
1812 gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
1813 SvREFCNT_dec(GvHV(gv));
1814 GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
1816 HvNAME(defstash) = savepv("main");
1817 incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
1819 defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
1820 errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
1822 (void)form("%240s",""); /* Preallocate temp - for immediate signals. */
1823 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
1824 sv_setpvn(ERRSV, "", 0);
1825 curstash = defstash;
1826 compiling.cop_stash = defstash;
1827 debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
1828 globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV));
1829 /* We must init $/ before switches are processed. */
1830 sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
1833 #ifdef CAN_PROTOTYPE
1835 open_script(char *scriptname, bool dosearch, SV *sv)
1838 open_script(scriptname,dosearch,sv)
1845 char *xfound = Nullch;
1846 char *xfailed = Nullch;
1850 #if defined(DOSISH) && !defined(OS2) && !defined(atarist)
1851 # define SEARCH_EXTS ".bat", ".cmd", NULL
1852 # define MAX_EXT_LEN 4
1855 # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL
1856 # define MAX_EXT_LEN 4
1859 # define SEARCH_EXTS ".pl", ".com", NULL
1860 # define MAX_EXT_LEN 4
1862 /* additional extensions to try in each dir if scriptname not found */
1864 char *ext[] = { SEARCH_EXTS };
1865 int extidx = 0, i = 0;
1866 char *curext = Nullch;
1868 # define MAX_EXT_LEN 0
1872 * If dosearch is true and if scriptname does not contain path
1873 * delimiters, search the PATH for scriptname.
1875 * If SEARCH_EXTS is also defined, will look for each
1876 * scriptname{SEARCH_EXTS} whenever scriptname is not found
1877 * while searching the PATH.
1879 * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search
1880 * proceeds as follows:
1881 * If DOSISH or VMSISH:
1882 * + look for ./scriptname{,.foo,.bar}
1883 * + search the PATH for scriptname{,.foo,.bar}
1886 * + look *only* in the PATH for scriptname{,.foo,.bar} (note
1887 * this will not look in '.' if it's not in the PATH)
1891 # ifdef ALWAYS_DEFTYPES
1892 len = strlen(scriptname);
1893 if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') {
1894 int hasdir, idx = 0, deftypes = 1;
1897 hasdir = !dosearch || (strpbrk(scriptname,":[</") != Nullch) ;
1900 int hasdir, idx = 0, deftypes = 1;
1903 hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
1905 /* The first time through, just add SEARCH_EXTS to whatever we
1906 * already have, so we can check for default file types. */
1908 (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) )
1914 if ((strlen(tokenbuf) + strlen(scriptname)
1915 + MAX_EXT_LEN) >= sizeof tokenbuf)
1916 continue; /* don't search dir with too-long name */
1917 strcat(tokenbuf, scriptname);
1921 if (strEQ(scriptname, "-"))
1923 if (dosearch) { /* Look in '.' first. */
1924 char *cur = scriptname;
1926 if ((curext = strrchr(scriptname,'.'))) /* possible current ext */
1928 if (strEQ(ext[i++],curext)) {
1929 extidx = -1; /* already has an ext */
1934 DEBUG_p(PerlIO_printf(Perl_debug_log,
1935 "Looking for %s\n",cur));
1936 if (PerlLIO_stat(cur,&statbuf) >= 0) {
1944 if (cur == scriptname) {
1945 len = strlen(scriptname);
1946 if (len+MAX_EXT_LEN+1 >= sizeof(tokenbuf))
1948 cur = strcpy(tokenbuf, scriptname);
1950 } while (extidx >= 0 && ext[extidx] /* try an extension? */
1951 && strcpy(tokenbuf+len, ext[extidx++]));
1956 if (dosearch && !strchr(scriptname, '/')
1958 && !strchr(scriptname, '\\')
1960 && (s = PerlEnv_getenv("PATH"))) {
1963 bufend = s + strlen(s);
1964 while (s < bufend) {
1965 #if defined(atarist) || defined(DOSISH)
1970 && *s != ';'; len++, s++) {
1971 if (len < sizeof tokenbuf)
1974 if (len < sizeof tokenbuf)
1975 tokenbuf[len] = '\0';
1976 #else /* ! (atarist || DOSISH) */
1977 s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf, s, bufend,
1980 #endif /* ! (atarist || DOSISH) */
1983 if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tokenbuf)
1984 continue; /* don't search dir with too-long name */
1986 #if defined(atarist) || defined(DOSISH)
1987 && tokenbuf[len - 1] != '/'
1988 && tokenbuf[len - 1] != '\\'
1991 tokenbuf[len++] = '/';
1992 if (len == 2 && tokenbuf[0] == '.')
1994 (void)strcpy(tokenbuf + len, scriptname);
1998 len = strlen(tokenbuf);
1999 if (extidx > 0) /* reset after previous loop */
2003 DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
2004 retval = PerlLIO_stat(tokenbuf,&statbuf);
2006 } while ( retval < 0 /* not there */
2007 && extidx>=0 && ext[extidx] /* try an extension? */
2008 && strcpy(tokenbuf+len, ext[extidx++])
2013 if (S_ISREG(statbuf.st_mode)
2014 && cando(S_IRUSR,TRUE,&statbuf)
2016 && cando(S_IXUSR,TRUE,&statbuf)
2020 xfound = tokenbuf; /* bingo! */
2024 xfailed = savepv(tokenbuf);
2027 if (!xfound && !seen_dot && !xfailed && (PerlLIO_stat(scriptname,&statbuf) < 0))
2029 seen_dot = 1; /* Disable message. */
2031 croak("Can't %s %s%s%s",
2032 (xfailed ? "execute" : "find"),
2033 (xfailed ? xfailed : scriptname),
2034 (xfailed ? "" : " on PATH"),
2035 (xfailed || seen_dot) ? "" : ", '.' not in PATH");
2038 scriptname = xfound;
2041 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
2042 char *s = scriptname + 8;
2051 origfilename = savepv(e_tmpname ? "-e" : scriptname);
2052 curcop->cop_filegv = gv_fetchfile(origfilename);
2053 if (strEQ(origfilename,"-"))
2055 if (fdscript >= 0) {
2056 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
2057 #if defined(HAS_FCNTL) && defined(F_SETFD)
2059 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2062 else if (preprocess) {
2063 char *cpp_cfg = CPPSTDIN;
2064 SV *cpp = NEWSV(0,0);
2065 SV *cmd = NEWSV(0,0);
2067 if (strEQ(cpp_cfg, "cppstdin"))
2068 sv_catpvf(cpp, "%s/", BIN_EXP);
2069 sv_catpv(cpp, cpp_cfg);
2072 sv_catpv(sv,PRIVLIB_EXP);
2076 sed %s -e \"/^[^#]/b\" \
2077 -e \"/^#[ ]*include[ ]/b\" \
2078 -e \"/^#[ ]*define[ ]/b\" \
2079 -e \"/^#[ ]*if[ ]/b\" \
2080 -e \"/^#[ ]*ifdef[ ]/b\" \
2081 -e \"/^#[ ]*ifndef[ ]/b\" \
2082 -e \"/^#[ ]*else/b\" \
2083 -e \"/^#[ ]*elif[ ]/b\" \
2084 -e \"/^#[ ]*undef[ ]/b\" \
2085 -e \"/^#[ ]*endif/b\" \
2088 (doextract ? "-e \"1,/^#/d\n\"" : ""),
2091 %s %s -e '/^[^#]/b' \
2092 -e '/^#[ ]*include[ ]/b' \
2093 -e '/^#[ ]*define[ ]/b' \
2094 -e '/^#[ ]*if[ ]/b' \
2095 -e '/^#[ ]*ifdef[ ]/b' \
2096 -e '/^#[ ]*ifndef[ ]/b' \
2097 -e '/^#[ ]*else/b' \
2098 -e '/^#[ ]*elif[ ]/b' \
2099 -e '/^#[ ]*undef[ ]/b' \
2100 -e '/^#[ ]*endif/b' \
2108 (doextract ? "-e '1,/^#/d\n'" : ""),
2110 scriptname, cpp, sv, CPPMINUS);
2112 #ifdef IAMSUID /* actually, this is caught earlier */
2113 if (euid != uid && !euid) { /* if running suidperl */
2115 (void)seteuid(uid); /* musn't stay setuid root */
2118 (void)setreuid((Uid_t)-1, uid);
2120 #ifdef HAS_SETRESUID
2121 (void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
2123 PerlProc_setuid(uid);
2127 if (PerlProc_geteuid() != uid)
2128 croak("Can't do seteuid!\n");
2130 #endif /* IAMSUID */
2131 rsfp = PerlProc_popen(SvPVX(cmd), "r");
2135 else if (!*scriptname) {
2136 forbid_setid("program input from stdin");
2137 rsfp = PerlIO_stdin();
2140 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
2141 #if defined(HAS_FCNTL) && defined(F_SETFD)
2143 fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
2151 #ifndef IAMSUID /* in case script is not readable before setuid */
2152 if (euid && PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
2153 statbuf.st_mode & (S_ISUID|S_ISGID)) {
2155 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2156 croak("Can't do setuid\n");
2160 croak("Can't open perl script \"%s\": %s\n",
2161 SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
2166 validate_suid(char *validarg, char *scriptname)
2170 /* do we need to emulate setuid on scripts? */
2172 /* This code is for those BSD systems that have setuid #! scripts disabled
2173 * in the kernel because of a security problem. Merely defining DOSUID
2174 * in perl will not fix that problem, but if you have disabled setuid
2175 * scripts in the kernel, this will attempt to emulate setuid and setgid
2176 * on scripts that have those now-otherwise-useless bits set. The setuid
2177 * root version must be called suidperl or sperlN.NNN. If regular perl
2178 * discovers that it has opened a setuid script, it calls suidperl with
2179 * the same argv that it had. If suidperl finds that the script it has
2180 * just opened is NOT setuid root, it sets the effective uid back to the
2181 * uid. We don't just make perl setuid root because that loses the
2182 * effective uid we had before invoking perl, if it was different from the
2185 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
2186 * be defined in suidperl only. suidperl must be setuid root. The
2187 * Configure script will set this up for you if you want it.
2194 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
2195 croak("Can't stat script \"%s\"",origfilename);
2196 if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
2200 #ifndef HAS_SETREUID
2201 /* On this access check to make sure the directories are readable,
2202 * there is actually a small window that the user could use to make
2203 * filename point to an accessible directory. So there is a faint
2204 * chance that someone could execute a setuid script down in a
2205 * non-accessible directory. I don't know what to do about that.
2206 * But I don't think it's too important. The manual lies when
2207 * it says access() is useful in setuid programs.
2209 if (PerlLIO_access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
2210 croak("Permission denied");
2212 /* If we can swap euid and uid, then we can determine access rights
2213 * with a simple stat of the file, and then compare device and
2214 * inode to make sure we did stat() on the same file we opened.
2215 * Then we just have to make sure he or she can execute it.
2218 struct stat tmpstatbuf;
2222 setreuid(euid,uid) < 0
2225 setresuid(euid,uid,(Uid_t)-1) < 0
2228 || PerlProc_getuid() != euid || PerlProc_geteuid() != uid)
2229 croak("Can't swap uid and euid"); /* really paranoid */
2230 if (PerlLIO_stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
2231 croak("Permission denied"); /* testing full pathname here */
2232 if (tmpstatbuf.st_dev != statbuf.st_dev ||
2233 tmpstatbuf.st_ino != statbuf.st_ino) {
2234 (void)PerlIO_close(rsfp);
2235 if (rsfp = PerlProc_popen("/bin/mail root","w")) { /* heh, heh */
2237 "User %ld tried to run dev %ld ino %ld in place of dev %ld ino %ld!\n\
2238 (Filename of set-id script was %s, uid %ld gid %ld.)\n\nSincerely,\nperl\n",
2239 (long)uid,(long)tmpstatbuf.st_dev, (long)tmpstatbuf.st_ino,
2240 (long)statbuf.st_dev, (long)statbuf.st_ino,
2241 SvPVX(GvSV(curcop->cop_filegv)),
2242 (long)statbuf.st_uid, (long)statbuf.st_gid);
2243 (void)PerlProc_pclose(rsfp);
2245 croak("Permission denied\n");
2249 setreuid(uid,euid) < 0
2251 # if defined(HAS_SETRESUID)
2252 setresuid(uid,euid,(Uid_t)-1) < 0
2255 || PerlProc_getuid() != uid || PerlProc_geteuid() != euid)
2256 croak("Can't reswap uid and euid");
2257 if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
2258 croak("Permission denied\n");
2260 #endif /* HAS_SETREUID */
2261 #endif /* IAMSUID */
2263 if (!S_ISREG(statbuf.st_mode))
2264 croak("Permission denied");
2265 if (statbuf.st_mode & S_IWOTH)
2266 croak("Setuid/gid script is writable by world");
2267 doswitches = FALSE; /* -s is insecure in suid */
2269 if (sv_gets(linestr, rsfp, 0) == Nullch ||
2270 strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
2271 croak("No #! line");
2272 s = SvPV(linestr,na)+2;
2274 while (!isSPACE(*s)) s++;
2275 for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
2276 (isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
2277 if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
2278 croak("Not a perl script");
2279 while (*s == ' ' || *s == '\t') s++;
2281 * #! arg must be what we saw above. They can invoke it by
2282 * mentioning suidperl explicitly, but they may not add any strange
2283 * arguments beyond what #! says if they do invoke suidperl that way.
2285 len = strlen(validarg);
2286 if (strEQ(validarg," PHOOEY ") ||
2287 strnNE(s,validarg,len) || !isSPACE(s[len]))
2288 croak("Args must match #! line");
2291 if (euid != uid && (statbuf.st_mode & S_ISUID) &&
2292 euid == statbuf.st_uid)
2294 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2295 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2296 #endif /* IAMSUID */
2298 if (euid) { /* oops, we're not the setuid root perl */
2299 (void)PerlIO_close(rsfp);
2302 PerlProc_execv(form("%s/sperl%s", BIN_EXP, patchlevel), origargv);
2304 croak("Can't do setuid\n");
2307 if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
2309 (void)setegid(statbuf.st_gid);
2312 (void)setregid((Gid_t)-1,statbuf.st_gid);
2314 #ifdef HAS_SETRESGID
2315 (void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
2317 PerlProc_setgid(statbuf.st_gid);
2321 if (PerlProc_getegid() != statbuf.st_gid)
2322 croak("Can't do setegid!\n");
2324 if (statbuf.st_mode & S_ISUID) {
2325 if (statbuf.st_uid != euid)
2327 (void)seteuid(statbuf.st_uid); /* all that for this */
2330 (void)setreuid((Uid_t)-1,statbuf.st_uid);
2332 #ifdef HAS_SETRESUID
2333 (void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
2335 PerlProc_setuid(statbuf.st_uid);
2339 if (PerlProc_geteuid() != statbuf.st_uid)
2340 croak("Can't do seteuid!\n");
2342 else if (uid) { /* oops, mustn't run as root */
2344 (void)seteuid((Uid_t)uid);
2347 (void)setreuid((Uid_t)-1,(Uid_t)uid);
2349 #ifdef HAS_SETRESUID
2350 (void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
2352 PerlProc_setuid((Uid_t)uid);
2356 if (PerlProc_geteuid() != uid)
2357 croak("Can't do seteuid!\n");
2360 if (!cando(S_IXUSR,TRUE,&statbuf))
2361 croak("Permission denied\n"); /* they can't do this */
2364 else if (preprocess)
2365 croak("-P not allowed for setuid/setgid script\n");
2366 else if (fdscript >= 0)
2367 croak("fd script not allowed in suidperl\n");
2369 croak("Script is not setuid/setgid in suidperl\n");
2371 /* We absolutely must clear out any saved ids here, so we */
2372 /* exec the real perl, substituting fd script for scriptname. */
2373 /* (We pass script name as "subdir" of fd, which perl will grok.) */
2374 PerlIO_rewind(rsfp);
2375 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
2376 for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
2377 if (!origargv[which])
2378 croak("Permission denied");
2379 origargv[which] = savepv(form("/dev/fd/%d/%s",
2380 PerlIO_fileno(rsfp), origargv[which]));
2381 #if defined(HAS_FCNTL) && defined(F_SETFD)
2382 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
2384 PerlProc_execv(form("%s/perl%s", BIN_EXP, patchlevel), origargv); /* try again */
2385 croak("Can't do setuid\n");
2386 #endif /* IAMSUID */
2388 if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
2389 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
2391 PerlLIO_fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
2392 if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
2394 (egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
2397 croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
2398 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
2399 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
2400 /* not set-id, must be wrapped */
2406 find_beginning(void)
2408 register char *s, *s2;
2410 /* skip forward in input to the real script? */
2414 if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
2415 croak("No Perl script found in input\n");
2416 if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
2417 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
2419 while (*s && !(isSPACE (*s) || *s == '#')) s++;
2421 while (*s == ' ' || *s == '\t') s++;
2423 while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
2424 if (strnEQ(s2-4,"perl",4))
2426 while (s = moreswitches(s)) ;
2428 if (cddir && PerlDir_chdir(cddir) < 0)
2429 croak("Can't chdir to %s",cddir);
2437 uid = (int)PerlProc_getuid();
2438 euid = (int)PerlProc_geteuid();
2439 gid = (int)PerlProc_getgid();
2440 egid = (int)PerlProc_getegid();
2445 tainting |= (uid && (euid != uid || egid != gid));
2449 forbid_setid(char *s)
2452 croak("No %s allowed while running setuid", s);
2454 croak("No %s allowed while running setgid", s);
2461 curstash = debstash;
2462 dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
2464 DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
2465 DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
2466 DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
2467 DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
2468 sv_setiv(DBsingle, 0);
2469 DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
2470 sv_setiv(DBtrace, 0);
2471 DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
2472 sv_setiv(DBsignal, 0);
2473 curstash = defstash;
2477 init_stacks(ARGSproto)
2480 mainstack = curstack; /* remember in case we switch stacks */
2481 AvREAL_off(curstack); /* not a real array */
2482 av_extend(curstack,127);
2484 stack_base = AvARRAY(curstack);
2485 stack_sp = stack_base;
2486 stack_max = stack_base + 127;
2488 cxstack_max = 8192 / sizeof(PERL_CONTEXT) - 2; /* Use most of 8K. */
2489 New(50,cxstack,cxstack_max + 1,PERL_CONTEXT);
2492 New(50,tmps_stack,128,SV*);
2498 * The following stacks almost certainly should be per-interpreter,
2499 * but for now they're not. XXX
2503 markstack_ptr = markstack;
2505 New(54,markstack,64,I32);
2506 markstack_ptr = markstack;
2507 markstack_max = markstack + 64;
2513 New(54,scopestack,32,I32);
2515 scopestack_max = 32;
2521 New(54,savestack,128,ANY);
2523 savestack_max = 128;
2529 New(54,retstack,16,OP*);
2540 Safefree(tmps_stack);
2548 static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
2561 subname = newSVpv("main",4);
2565 init_predump_symbols(void)
2572 sv_setpvn(*av_fetch(thr->threadsv,find_threadsv("\""),FALSE)," ", 1);
2574 sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
2575 #endif /* USE_THREADS */
2577 stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
2578 GvMULTI_on(stdingv);
2579 IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
2580 tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
2582 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
2584 tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
2586 IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
2588 tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
2590 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
2592 othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
2593 GvMULTI_on(othergv);
2594 IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
2595 tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
2597 GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
2599 statname = NEWSV(66,0); /* last filename we did stat on */
2602 osname = savepv(OSNAME);
2606 init_postdump_symbols(register int argc, register char **argv, register char **env)
2613 argc--,argv++; /* skip name of script */
2615 for (; argc > 0 && **argv == '-'; argc--,argv++) {
2618 if (argv[0][1] == '-') {
2622 if (s = strchr(argv[0], '=')) {
2624 sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
2627 sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
2630 toptarget = NEWSV(0,0);
2631 sv_upgrade(toptarget, SVt_PVFM);
2632 sv_setpvn(toptarget, "", 0);
2633 bodytarget = NEWSV(0,0);
2634 sv_upgrade(bodytarget, SVt_PVFM);
2635 sv_setpvn(bodytarget, "", 0);
2636 formtarget = bodytarget;
2639 if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
2640 sv_setpv(GvSV(tmpgv),origfilename);
2641 magicname("0", "0", 1);
2643 if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
2644 sv_setpv(GvSV(tmpgv),origargv[0]);
2645 if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
2647 (void)gv_AVadd(argvgv);
2648 av_clear(GvAVn(argvgv));
2649 for (; argc > 0; argc--,argv++) {
2650 av_push(GvAVn(argvgv),newSVpv(argv[0],0));
2653 if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
2657 hv_magic(hv, envgv, 'E');
2658 #ifndef VMS /* VMS doesn't have environ array */
2659 /* Note that if the supplied env parameter is actually a copy
2660 of the global environ then it may now point to free'd memory
2661 if the environment has been modified since. To avoid this
2662 problem we treat env==NULL as meaning 'use the default'
2667 environ[0] = Nullch;
2668 for (; *env; env++) {
2669 if (!(s = strchr(*env,'=')))
2672 #if defined(WIN32) || defined(MSDOS)
2675 sv = newSVpv(s--,0);
2676 (void)hv_store(hv, *env, s - *env, sv, 0);
2678 #if defined(__BORLANDC__) && defined(USE_WIN32_RTL_ENV)
2679 /* Sins of the RTL. See note in my_setenv(). */
2680 (void)PerlEnv_putenv(savepv(*env));
2684 #ifdef DYNAMIC_ENV_FETCH
2685 HvNAME(hv) = savepv(ENV_HV_NAME);
2689 if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
2690 sv_setiv(GvSV(tmpgv), (IV)getpid());
2699 s = PerlEnv_getenv("PERL5LIB");
2703 incpush(PerlEnv_getenv("PERLLIB"), FALSE);
2705 /* Treat PERL5?LIB as a possible search list logical name -- the
2706 * "natural" VMS idiom for a Unix path string. We allow each
2707 * element to be a set of |-separated directories for compatibility.
2711 if (my_trnlnm("PERL5LIB",buf,0))
2712 do { incpush(buf,TRUE); } while (my_trnlnm("PERL5LIB",buf,++idx));
2714 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE);
2718 /* Use the ~-expanded versions of APPLLIB (undocumented),
2719 ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
2722 incpush(APPLLIB_EXP, FALSE);
2726 incpush(ARCHLIB_EXP, FALSE);
2729 #define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
2731 incpush(PRIVLIB_EXP, FALSE);
2734 incpush(SITEARCH_EXP, FALSE);
2737 incpush(SITELIB_EXP, FALSE);
2739 #ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
2740 incpush(OLDARCHLIB_EXP, FALSE);
2744 incpush(".", FALSE);
2748 # define PERLLIB_SEP ';'
2751 # define PERLLIB_SEP '|'
2753 # define PERLLIB_SEP ':'
2756 #ifndef PERLLIB_MANGLE
2757 # define PERLLIB_MANGLE(s,n) (s)
2761 incpush(char *p, int addsubdirs)
2763 SV *subdir = Nullsv;
2764 static char *archpat_auto;
2771 if (!archpat_auto) {
2772 STRLEN len = (sizeof(ARCHNAME) + strlen(patchlevel)
2773 + sizeof("//auto"));
2774 New(55, archpat_auto, len, char);
2775 sprintf(archpat_auto, "/%s/%s/auto", ARCHNAME, patchlevel);
2777 for (len = sizeof(ARCHNAME) + 2;
2778 archpat_auto[len] != '\0' && archpat_auto[len] != '/'; len++)
2779 if (archpat_auto[len] == '.') archpat_auto[len] = '_';
2784 /* Break at all separators */
2786 SV *libdir = newSV(0);
2789 /* skip any consecutive separators */
2790 while ( *p == PERLLIB_SEP ) {
2791 /* Uncomment the next line for PATH semantics */
2792 /* av_push(GvAVn(incgv), newSVpv(".", 1)); */
2796 if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
2797 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
2802 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
2803 p = Nullch; /* break out */
2807 * BEFORE pushing libdir onto @INC we may first push version- and
2808 * archname-specific sub-directories.
2811 struct stat tmpstatbuf;
2816 if ((unix = tounixspec_ts(SvPV(libdir,na),Nullch)) != Nullch) {
2818 while (unix[len-1] == '/') len--; /* Cosmetic */
2819 sv_usepvn(libdir,unix,len);
2822 PerlIO_printf(PerlIO_stderr(),
2823 "Failed to unixify @INC element \"%s\"\n",
2826 /* .../archname/version if -d .../archname/version/auto */
2827 sv_setsv(subdir, libdir);
2828 sv_catpv(subdir, archpat_auto);
2829 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2830 S_ISDIR(tmpstatbuf.st_mode))
2831 av_push(GvAVn(incgv),
2832 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2834 /* .../archname if -d .../archname/auto */
2835 sv_insert(subdir, SvCUR(libdir) + sizeof(ARCHNAME),
2836 strlen(patchlevel) + 1, "", 0);
2837 if (PerlLIO_stat(SvPVX(subdir), &tmpstatbuf) >= 0 &&
2838 S_ISDIR(tmpstatbuf.st_mode))
2839 av_push(GvAVn(incgv),
2840 newSVpv(SvPVX(subdir), SvCUR(subdir) - sizeof "auto"));
2843 /* finally push this lib directory on the end of @INC */
2844 av_push(GvAVn(incgv), libdir);
2847 SvREFCNT_dec(subdir);
2851 STATIC struct perl_thread *
2854 struct perl_thread *thr;
2857 Newz(53, thr, 1, struct perl_thread);
2858 curcop = &compiling;
2859 thr->cvcache = newHV();
2860 thr->threadsv = newAV();
2861 thr->specific = newAV();
2862 thr->errhv = newHV();
2863 thr->flags = THRf_R_JOINABLE;
2864 MUTEX_INIT(&thr->mutex);
2865 /* Handcraft thrsv similarly to mess_sv */
2866 New(53, thrsv, 1, SV);
2867 Newz(53, xpv, 1, XPV);
2868 SvFLAGS(thrsv) = SVt_PV;
2869 SvANY(thrsv) = (void*)xpv;
2870 SvREFCNT(thrsv) = 1 << 30; /* practically infinite */
2871 SvPVX(thrsv) = (char*)thr;
2872 SvCUR_set(thrsv, sizeof(thr));
2873 SvLEN_set(thrsv, sizeof(thr));
2874 *SvEND(thrsv) = '\0'; /* in the trailing_nul field */
2876 curcop = &compiling;
2879 MUTEX_LOCK(&threads_mutex);
2884 MUTEX_UNLOCK(&threads_mutex);
2886 #ifdef HAVE_THREAD_INTERN
2887 init_thread_intern(thr);
2890 #ifdef SET_THREAD_SELF
2891 SET_THREAD_SELF(thr);
2893 thr->self = pthread_self();
2894 #endif /* SET_THREAD_SELF */
2898 * These must come after the SET_THR because sv_setpvn does
2899 * SvTAINT and the taint fields require dTHR.
2901 toptarget = NEWSV(0,0);
2902 sv_upgrade(toptarget, SVt_PVFM);
2903 sv_setpvn(toptarget, "", 0);
2904 bodytarget = NEWSV(0,0);
2905 sv_upgrade(bodytarget, SVt_PVFM);
2906 sv_setpvn(bodytarget, "", 0);
2907 formtarget = bodytarget;
2908 thr->errsv = newSVpv("", 0);
2911 #endif /* USE_THREADS */
2914 call_list(I32 oldscope, AV *paramList)
2917 line_t oldline = curcop->cop_line;
2922 while (AvFILL(paramList) >= 0) {
2923 CV *cv = (CV*)av_shift(paramList);
2932 perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
2933 (void)SvPV(atsv, len);
2936 curcop = &compiling;
2937 curcop->cop_line = oldline;
2938 if (paramList == beginav)
2939 sv_catpv(atsv, "BEGIN failed--compilation aborted");
2941 sv_catpv(atsv, "END failed--cleanup aborted");
2942 while (scopestack_ix > oldscope)
2944 croak("%s", SvPVX(atsv));
2952 /* my_exit() was called */
2953 while (scopestack_ix > oldscope)
2956 curstash = defstash;
2958 call_list(oldscope, endav);
2960 curcop = &compiling;
2961 curcop->cop_line = oldline;
2963 if (paramList == beginav)
2964 croak("BEGIN failed--compilation aborted");
2966 croak("END failed--cleanup aborted");
2972 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
2977 curcop = &compiling;
2978 curcop->cop_line = oldline;
2991 DEBUG_L(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
2992 thr, (unsigned long) status));
2993 #endif /* USE_THREADS */
3002 STATUS_NATIVE_SET(status);
3009 my_failure_exit(void)
3012 if (vaxc$errno & 1) {
3013 if (STATUS_NATIVE & 1) /* fortuitiously includes "-1" */
3014 STATUS_NATIVE_SET(44);
3017 if (!vaxc$errno && errno) /* unlikely */
3018 STATUS_NATIVE_SET(44);
3020 STATUS_NATIVE_SET(vaxc$errno);
3024 STATUS_POSIX_SET(errno);
3025 else if (STATUS_POSIX == 0)
3026 STATUS_POSIX_SET(255);
3035 register PERL_CONTEXT *cx;
3044 (void)UNLINK(e_tmpname);
3045 Safefree(e_tmpname);
3049 if (cxstack_ix >= 0) {